Abstract:
The present invention relates to a method for producing a vertical interconnect structure, a memory device and an associated production method, in which case, after the formation of a contact region in a carrier substrate a catalyst is produced on the contact region and a free-standing electrically conductive nanoelement is subsequently formed between the catalyst and the contact region and embedded in a dielectric layer.
Abstract:
One or more embodiments relate to a memory device, comprising: a substrate; a gate stack disposed over the substrate, the gate stack comprising a control gate disposed over a charge storage layer; and a spacer select gate disposed over the substrate and laterally disposed from the gate stack, the select gate comprising a carbon allotrope.
Abstract:
The invention relates to a memory device, in particular to a resistively switching memory device such as a Phase Change Random Access Memory (“PCRAM”). In one disclosed method, a nanowire of non-conducting material is formed serving as a mould for producing a nanotube of conducting material. A volume of switching active material is deposited on top of the nanotube, so that the ring-shaped front face of the nanotube couples to the switching active material and thus forms a bottom electrode contact.
Abstract:
In a method for producing a microelectronic electrode structure a first wiring plane is prepared, an insulating region on the first wiring plane is provided, a through-hole in the insulating region is formed, a ring electrode in the through-hole is formed, and a second wiring plane is formed on the insulating region. The ring electrode comprises a first side and a second side, the ring electrode is electrically connected on the first side to the first wiring plane, and the second wiring plane is electrically connected to the second side of the ring electrode.
Abstract:
Fabricating a trench capacitor with an insulation collar in a substrate, which is electrically connected thereto on one side through a buried contact, in particular, for a semiconductor memory cell with a planar selection transistor in the substrate and connected through the buried contact, includes providing a trench using an opening in a hard mask, providing a capacitor dielectric in lower and central trench regions, the collar in central and upper trench regions, and a conductive filling at least as far as the insulation collar topside, completely filling the trench with a filling material, carrying out STI trench fabrication process, removing the filling material and sinking the filling to below the collar topside, forming an insulation region on one side above the collar; uncovering a connection region on a different side above the collar, and forming the buried contact by depositing and etching back a metallic filling.
Abstract:
A layer structure and process for providing sublithographic structures are provided. A first auxiliary layer is formed over a surface of a carrier layer. A lithographically patterned second auxiliary layer structure is formed on a surface of the first auxiliary layer. The first auxiliary layer is anisotropically etched using the patterned second auxiliary layer structure as mask to form an anisotropically patterned first auxiliary layer structure. The anisotropically patterned first auxiliary layer structure is isotropically etched back using the patterned second auxiliary layer structure to remove subsections below the second auxiliary layer structure and to form an isotropically patterned first auxiliary layer structure. A mask layer is formed over the carrier layer including the subsections beneath the second auxiliary layer structure and is anisotropically etched down to the carrier layer to form the sublithographic structures. The first and second auxiliary layer structures are removed to uncover the sublithographic structures.
Abstract:
A thin SiGe layer is provided as an additional lower gate electrode layer and is arranged between a thin gate oxide and a gate electrode layer, preferably of polysilicon. The SiGe layer can be etched selectively to the gate electrode and the gate oxide and is laterally removed adjacent the source/drain regions in order to form recesses, which are subsequently filled with a material that is appropriate for charge-trapping. The device structure and production method are appropriate for an integration scheme comprising local interconnects of memory cells, a CMOS logic periphery and means to compensate differences of the layer levels in the array and the periphery.
Abstract:
The present invention provides a method for fabricating a trench capacitor with an insulation collar in a substrate, which is electrically connected to the substrate on one side via a buried contact, in particular for a semiconductor memory cell with a planar selection transistor that is provided in the substrate and connected via the buried contact The invention likewise provides a corresponding trench capacitor.
Abstract:
The present invention provides a method for fabricating a stacked capacitor array (1), which comprises a regular arrangement of a plurality of stacked capacitors (2), with a stacked capacitor (2) being at a shorter distance from the respective adjacent stacked capacitor (2) in certain first directions (3) than in certain second directions (4), comprising the following method steps: provision of an auxiliary layer stack (5) having first auxiliary layers (6) with a predetermined etching rate and at least one second auxiliary layer (7) with a higher etching rate on a substrate (8); etching of in each case one hollow cylinder (9) for each stacked capacitor (2) through the auxiliary layer stack (5) in accordance with the regular arrangement, with the auxiliary layer stack (5) being left in place in intermediate regions (10) between the hollow cylinders (9); isotropic etching of the second auxiliary layers (7) to form widened portions (11) of the hollow cylinders (9), without any second auxiliary layer (7) being left in place between in each case two hollow cylinders (9) which adjoin one another in the first direction (3) and with a second residual auxiliary layer (7a) being left in place between in each case two hollow cylinders (9) which adjoin one another in the second direction (4); conformal deposition of an insulator layer (12) in order to completely fill the widened portions (11); deposition of a first electrode layer (13) in the hollow cylinders (9) in order to form the stacked capacitors (2); filling of the hollow cylinders (9) with a first filling (14); removal of the first auxiliary layers (6), the second residual auxiliary layers (7a) and the first filling (14) and completion of the stacked capacitor array (1).
Abstract:
A method is taught for fabricating patterned silicon dioxide layers on process areas disposed perpendicularly or at an inclination to a substrate surface. Firstly, a starter layer having leaving groups is produced by non-conformal deposition of a reactive component. Tris(tert-butoxy)silanol is subsequently added. The addition of the tris(tert-butoxy)silanol leads to the formation of a silicon dioxide layer selectively only on the starter layer.